Check And Adjust Air Conditioner - Komatsu PW160-7H Operation & Maintenance Manual

SERVICE PROCEDURE

CHECK AND ADJUST AIR CONDITIONER

CHECK LEVEL OF REFRIGERANT (GAS)
If the refrigerant used in the cooler gets into your eyes or on
your hands, it may cause loss of sight or frostbite. Do not
touch the refrigerant. Never loosen any part of the refrigerant
circuit.
Do not bring any flame close to any point where the refriger-
ant gas is leaking.
If there is a lack of refrigerant (Freon 134a), the cooling perfor-
mance will be poor.
When operating the cooler at high speed, there should be no bub-
bles in the sight glass (inspection window) mounted on the con-
denser unit receiver.
A: No bubbles in refrigerant flow: Correct
●
B: Bubbles in refrigerant flow (bubbles continuously pass
●
through): Refrigerant level low
C: Colorless, transparent: No refrigerant
●
REMARK
When there are bubbles, the refrigerant gas level is low, so
contact your refrigerant dealer to have refrigerant added. If the air
conditioner is run with the refrigerant gas level low, it will cause
damage to the compressor.
Check in off-season
When not being used for a long period, operate the cooler for 3 to
5 minutes once a month to supply lubricant to each component of
the compressor.
Inspection and maintenance items list for cooler
Inspection and
maintenance items
Refrigerant (gas)
Condenser
Compressor
V belt
Blower motor and fan
Control mechanism
Piping for connection
266
WARNING
Contents
Filling quantity
Clogging of fin
Function
Damage and tension
Function (Check for abnormal sound)
Function (Check for normal function)
Installation condition looseness of tightening
connection portions gas leakage, damage
Sight glass
Receiver
Maintenance interval
Twice a year; spring and
autumn
Every 500 hours
Every 4000 hours
Every 250 hours
When required
When required
When required
PW160-7H VEAM390100
MAINTENANCE
A
B
C